Covering of artificial material



Feb. 5, 1957 w. LENNARTZ I COVERING OF ARTIFICIAL MATERIAL Filed June25, 1953 INVENTOR. [VAL 75/? Af/V/VA/f 7' Z M77 2%;

COVERING F ARTIFICIAL MATERIAL Walter Lennartz, Dachau, near Munich,Germany Application June 25, 1953, Serial No. 364,168

Claims priority, application Germany June 30, 1952 2 Claims. (Cl.150-39) The present invention relates to a file cover made of artificialmaterial for use in holding documents, records, etc., and isparticularly directed to a file cover provided with simple and reliablemeans for securing it in closed condition.

According to the invention the cover consists of an upper covering sheetand of a lower covering sheet which may be joined to each other ateither two contiguous peripheral edges, or at merely one edge, like anordinary file cover.

The invention resides in the feature that one of the covering sheets isprovided at either one free corner, or at two free corners with a pocketof the same material for the insertion therein of one or two freecorners of the associated covering sheet, whereby the pocket flatlyrests against the covering sheet and because of the inherent elastictenacity of the artificial material of covering sheet and pocketelastically secures the free corner in closing position.

Holding pockets of a similar type for loose sheets of paper or the likehave already been known for writing pads, photographic albums etc.Holding pockets of this known kind are provided on the outside of thesupporting means to which the sheet of blotting paper or the photographetc. is attached, and there are disposed iii each case four of theseholding pockets to secure the sheet or sheets of blotting paper,photograph etc. in position. It is obvious, therefore, that these knownholding pockets do not constitute a holding or closing means asdescribed in the present invention.

The closing or holding pockets of the invention further serve as a meansof protecting the edges of the documents etc. and of the cover againsttearing, which is of particular importance for covers produced fromartificial material. It is a well-known fact that the edges of articlesof artificial material are more exposed to i wear and tear than otherportions of the article, and that for that reason the lifetime of sucharticles depends to a large extent upon adequate protection of theiredges, as slight injuries of the edges quickly enlarge and thus make thearticle unsuited for use. It is further known that reinforcement of theartificial material by metals or other suitable material is impossible.The protection of the edges against wear by means of the same materialis, therefore, an important feature of the invention.

On the other hand, the fastening of the free corners of one coveringsheet in the aforesaid holding pockets of the other covering sheet isimportant for the reason that it reliably prevents the documents etc.from slipping out of the smooth and slippery cover, particularly if thecover is filled up with such documents etc., or when a plurality of suchcovers are piled up on top of each other.

The invention will be best understood from a consideration of thefollowing detailed description taken in connection with the accompanyingdrawings, forming a part of this specification, and in which twoembodiments United States Pat n of the invention have been shown by wayof illustration. However, I wish to state that the invention is notconfined to any strict conformity with the showing of the drawing, butmay be changed or modified, so long as such changes or modificationsmark no material departure from the salient features of the invention asexpressed in the appended claims.

In the drawing in which like or identical parts are referred to by thesame reference characters Fig. 1 is an elevational view of a coverclosed at its back and at its bottom;

Fig. 2 is an enlarged fragmentary and sectional view of a cover closedat its back and bottom and the free corner of its lower covering sheetengaging the pocket provided on the underside of the free corner of theupper covering sheet;

Fig. 3 is a modification, in which one of the covering sheets isprovided with two long-stretched pockets.

In the embodiment illustrated in Figs. 1 and 2, the reference charactera designates the upper covering sheet, while b denotes the lowercovering sheet of the cover a, 1) consisting of artificial material andclosed at its bottom e and at its back c is the pocket consistinglikewise of artificial material and serving as closing means for thecover, and which may be arranged on the inside of the free upper cornerof either the upper covering sheet a or lower covering sheet b of thecover.

As shown in Fig. 2 the upper and lower cover sheets a, b are rectangularin shape and have longitudinal and transverse edges, contiguouslongitudinal edges 1 and transverse edges e are attached to each other.Pocket c is constituted by a substantially triangular shaped piece ofplastic material joined in substantially fiat condition to the innerface of cover sheet a, as shown.

As will be seen from an inspection of the drawing, the pocket 0, in theembodiment of Fig. 2, has been provided on the upper covering sheet a,so that when the corresponding free upper corner of the lower coveringsheet b is pushed into the pocket c, any documents etc. placed on saidlower covering sheet b may thereby likewise be clampingly secured intheir position. On the other hand, if the pocket c is provided on thelower covering sheet b, it may happen that the pocket 0 is covered up bythe documents or the like placed on the lower covering sheet b, so thatprior to pushing the corner of the upper covering sheet into the pocket0 of the lower covering sheet the documents etc. would have to be liftedfrom the lower covering sheet.

In the modification illustrated in Fig. 3, the cover a is merely closedat its rear end or back 1" like an ordinary file cover, but provided onthe inside of both of the free corners, of preferably the upper coveringsheet a with pockets 0' and c" as shown in Fig. 2, into which thecorresponding free corners of the lower covering sheet b together withdocuments etc. (now shown) when placed on it are pushed, so thatslipping of the documents etc. from the then closed cover a is therebyreliably prevented.

In the embodiment of Fig. 3 the pockets 0', c" are of long-stretchedformation, serving in this way simultaneously as a means of protectingthe edges of the cover and of the documents etc. enclosed in the coveragainst tearing.

The pockets c, c may be secured to the cover in any customary manner,and in case two pockets are provided on the cover, they may be of equalor different size. In the latter case, the lower one should preferablybe of larger size than the upper one.

As the inserted corners can easily be'retracted from the pockets, theopening of the cover is no problem in any Way.

It can thus be seen, that there has been provided according to theinvention a file cover of smooth plastic material comprising an uppercover sheet, a lower cover sheet attached to said upper cover sheetalong contiguous peripheral edge portions thereof for holdingsubstantially flat articles therebetween, said cover sheets having eachan end edge remote from said attached edge portions, and apolygonal-shaped piece of sheet material made of the same material asthat of said cover sheets and joined in substantially fiat condition tothe inner face of one of said cover sheets at at least one of said endedges, whereby at least one inner edge pocket is obtained in which theother end edge of said other cover sheet may be inserted and retainedtherein in closed position of said file cover, so that said articleswhen placed in the latter will be effectively prevented from slippingout of said file cover.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is:

l. A file cover made of smooth plastic material eomby at least one inneredge pocket is obtained in which the other end edge of said other coversheet may be inserted and retained therein in closed position of saidfile cover, so that said articles when placed in the latter will beeffectively prevented from slipping out of said file cover' 2. A filecover made of plastic sheet material comprising a substantiallyrectangular-shaped upper cover sheet having longitudinal and transverseedges, a lower rectangular-shaped cover sheet having longitudinal andtransverse edges, said cover sheets being attached to each other alongtwo contiguous longitudinal and transverse edges of said sheets forholding substantially flat articles therebetween, said cover sheetshaving each a corner. portion remote from said attached edges, and asubstantially triangular-shaped piece of plastic sheet material joinedin substantially flat condition to the inner face of one of said coversheets at the respective corner portion, whereby an inner corner pocketis obtained in which the corresponding opposite corner portion of saidother cover sheet may be inserted and retained therein in closedposition of said file cover, said pocket being of such dimension so asto prevent said articles when placed in said file cover from slippingout of the latter.

References Cited in the file of this patent UNITED STATES PATENTS393,198 Young Nov. 20, 1888 807,648 Wiggins Dec. 19, 1905 945,710 DoxseeJan. 4, 1910 1,850,059 Bolton Mar. 15, 1932 2,029,245 Lyon Jan. 28, 19362,137,826 Williams Nov. 22, 1938 2,227,191 MacLeod Dec. 31, 19402,628,650 Silva Feb. 17, 1953 Pin w

